$fontSizes: (
	"smaller": 0.75,
	"small": 0.875,
	"regular": 1,
	"large": 1.25,
	"larger": 2,
);

// Maps a named font-size to its predefined size. Units default to em, but can
// be changed using the multiplier parameter.
@mixin font-size($sizeName, $multiplier: 1em) {
	font-size: map.get($fontSizes, $sizeName) * $multiplier;
}

@keyframes spinner__animation {
	0% {
		animation-timing-function: cubic-bezier(0.5856, 0.0703, 0.4143, 0.9297);
		transform: rotate(0deg);
	}
	100% {
		transform: rotate(360deg);
	}
}

@keyframes loading__animation {
	100% {
		transform: translateX(100%);
	}
}

// Adds animation to placeholder section
@mixin placeholder($include-border-radius: true) {
	outline: 0 !important;
	border: 0 !important;
	background-color: currentColor !important;
	color: currentColor !important;
	width: 100%;
	@if $include-border-radius == true {
		border-radius: 0.25rem;
	}
	display: block;
	line-height: 1;
	position: relative !important;
	overflow: hidden !important;
	max-width: 100% !important;
	pointer-events: none;
	box-shadow: none;
	z-index: 1; /* Necessary for overflow: hidden to work correctly in Safari */
	opacity: 0.15;

	// Forces direct descendants to keep layout but lose visibility.
	> * {
		visibility: hidden;
	}

	&::after {
		content: " ";
		display: block;
		position: absolute;
		left: 0;
		right: 0;
		top: 0;
		height: 100%;
		background-repeat: no-repeat;
		background-image: linear-gradient(90deg, currentColor, #f5f5f54d, currentColor);
		transform: translateX(-100%);
		animation: loading__animation 1.5s ease-in-out infinite;
	}

	@media screen and (prefers-reduced-motion: reduce) {
		animation: none;
	}
}

@mixin force-content() {
	&::before {
		content: "\00a0";
	}
}

// Hide an element from sighted users, but available to screen reader users.
@mixin visually-hidden() {
	border: 0;
	clip: rect(1px, 1px, 1px, 1px);
	clip-path: inset(50%);
	height: 1px;
	width: 1px;
	margin: -1px;
	overflow: hidden;
	/* Many screen reader and browser combinations announce broken words as they would appear visually. */
	overflow-wrap: normal !important;
	word-wrap: normal !important;
	padding: 0;
	position: absolute !important;
}

@mixin visually-hidden-focus-reveal() {
	background-color: #fff;
	border-radius: 3px;
	box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
	clip: auto !important;
	clip-path: none;
	color: $input-text-active;
	display: block;
	font-size: 0.875rem;
	font-weight: 700;
	height: auto;
	left: 5px;
	line-height: normal;
	padding: 15px 23px 14px;
	text-decoration: none;
	top: 5px;
	width: auto;
	z-index: 100000;
}

@mixin reset-box() {
	border: 0;
	border-radius: 0;
	margin: 0;
	padding: 0;
	vertical-align: baseline;
}

@mixin reset-color() {
	color: inherit;
}

@mixin reset-typography() {
	font-family: inherit;
	font-size: inherit;
	font-style: inherit;
	font-weight: inherit;
	letter-spacing: inherit;
	line-height: inherit;
	text-decoration: inherit;
	text-transform: inherit;
}

// Reset <h1>, <h2>, etc. styles as if they were text. Useful for elements that must be headings for a11y but don't need those styles.
@mixin text-heading() {
	@include reset-box();
	@include reset-color();
	@include reset-typography();
	box-shadow: none;
	display: inline;

	background: transparent;
}

// Reset <button> style as if it was text. Useful for elements that must be `<button>` for a11y but don't need those styles.
@mixin text-button() {
	@include reset-box();
	@include reset-color();
	@include reset-typography();
	background: transparent;
	box-shadow: none;
	display: inline;
	text-shadow: none;

	&:hover,
	&:focus,
	&:active {
		background: transparent;
	}
}

// Reset <button> style so we can use link style for action buttons.
@mixin link-button() {
	@include text-button();
	text-decoration: underline;
}

@mixin hover-effect() {
	&:hover {
		text-decoration: none;
		color: inherit;
		cursor: pointer;
	}
}

// Reset <button> style so we can use link style for action buttons in filter blocks
@mixin filter-link-button() {
	@include link-button();
	@include hover-effect();
	@include font-size(small);
	text-decoration: underline;
	font-weight: normal;
	color: inherit;
}

// Makes sure long words are broken if they overflow the container.
@mixin wrap-break-word() {
	// This is the current standard, works in most browsers.
	overflow-wrap: anywhere;
	// Safari supports word-break.
	word-break: break-word;
	// IE11 doesn't support overflow-wrap neither word-break: break-word, so we fallback to -ms-work-break: break-all.
	-ms-word-break: break-all;
}

// Add support for content alignment classes
@mixin with-alignment() {
	// Apply max-width to floated items that have no intrinsic width
	&.alignleft,
	&.alignright {
		max-width: $content-width * 0.5;
		width: 100%;
	}

	// Using flexbox without an assigned height property breaks vertical center alignment in IE11.
	// Appending an empty ::after element tricks IE11 into giving the cover image an implicit height, which sidesteps this issue.
	&::after {
		display: block;
		content: "";
		font-size: 0;
		min-height: inherit;

		// IE doesn't support flex so omit that.
		@supports (position: sticky) {
			content: none;
		}
	}

	// Aligned cover blocks should not use our global alignment rules
	&.aligncenter,
	&.alignleft,
	&.alignright {
		display: flex;
	}
}

// Shows an semi-transparent overlay
@mixin with-background-dim($opacity: 0.5) {
	&.has-background-dim {
		.background-dim__overlay::before {
			content: "";
			position: absolute;
			top: 0;
			left: 0;
			bottom: 0;
			right: 0;
			background: inherit;
			border-radius: inherit;
			opacity: $opacity;
			z-index: 1;
		}
	}

	@for $i from 1 through 10 {
		&.has-background-dim-#{ $i * 10 } .background-dim__overlay::before {
			opacity: $i * 0.1;
		}
	}
}

// Shows a border with the current color and a custom opacity. That can't be achieved
// with normal border because `currentColor` doesn't allow tweaking the opacity, and
// setting the opacity of the entire element would change the children's opacity too.
@mixin with-translucent-border($border-width: 1px, $opacity: 0.3) {
	position: relative;

	&::after {
		border-style: solid;
		border-width: $border-width;
		bottom: 0;
		content: "";
		display: block;
		left: 0;
		opacity: $opacity;
		pointer-events: none;
		position: absolute;
		right: 0;
		top: 0;
	}
}

// Wraps the content with a media query specially targeting IE11.
@mixin ie11() {
	@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
		@content;
	}
}

// Positions an element absolutely and stretches it over the container
@mixin absolute-stretch() {
	margin: 0;
	padding: 0;
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	width: 100%;
	height: 100%;
}

// Converts a px unit to em.
@function em($size, $base: 16px) {
	@return math.div($size, $base) * 1em;
}

// Encodes hex colors so they can be used in URL content.
@function encode-color($color) {
	@if type-of($color) != "color" or string.index(#{$color}, "#") != 1 {
		@return $color;
	}

	$hex: string.slice(color.ie-hex-str($color), 4);
	@return "%23" + unquote("#{$hex}");
}
